:root {
    --primary-color: #FF0000;
    --background-color: #FFFFFF;
    --container-color: #F5F5F5;
    --text-color: #FF0000;
    --hover-color: #CC0000;
    --light-hover: #FFE6E6;
}

body {
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    font-family: 'Arial', sans-serif;
    transition: all 0.5s ease;
}

.container {
    background-color: var(--container-color);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 600px;
    border: 2px solid var(--primary-color);
    animation: fadeIn 0.5s ease-in-out;
}

h1 {
    text-align: center;
    color: var(--primary-color);
    font-size: 28px;
    margin-bottom: 20px;
    animation: slideDown 0.5s ease-in-out;
}

.input-group, .category {
    margin-bottom: 15px;
}

.category-flex {
    display: flex;
    gap: 10px;
    align-items: flex-end;
}

.category-flex div {
    flex: 1;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: var(--hover-color);
}

input {
    width: 100%;
    padding: 10px;
    border: 2px solid var(--primary-color);
    border-radius: 5px;
    font-size: 16px;
    background-color: var(--background-color);
    color: var(--text-color);
    box-sizing: border-box;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

input:focus {
    border-color: var(--hover-color);
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.3);
    outline: none;
}

.custom-dropdown {
    position: relative;
    width: 100%;
}

.dropdown-selected {
    padding: 10px;
    border: 2px solid var(--primary-color);
    border-radius: 5px;
    background-color: var(--background-color);
    color: var(--text-color);
    font-size: 16px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.dropdown-selected:hover {
    background-color: var(--light-hover);
    transform: scale(1.02);
}

.dropdown-selected::after {
    content: '▼';
    font-size: 12px;
    color: var(--hover-color);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--background-color);
    border: 2px solid var(--primary-color);
    border-radius: 5px;
    max-height: 200px;
    overflow-y: auto;
    z-index: 1000;
    display: none;
    list-style: none;
    padding: 0;
    margin: 5px 0 0;
    animation: fadeIn 0.3s ease-in-out;
}

.dropdown-menu li {
    padding: 10px;
    color: var(--text-color);
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.dropdown-menu li:hover {
    background-color: var(--light-hover);
}

.dropdown-menu.show {
    display: block;
}

button {
    width: 100%;
    padding: 12px;
    background-color: var(--primary-color);
    color: #FFFFFF;
    border: 2px solid var(--primary-color);
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    margin-top: 10px;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

button:hover {
    background-color: var(--hover-color);
    transform: scale(1.05);
}

#result {
    margin-top: 20px;
    padding: 15px;
    border-radius: 5px;
    font-size: 16px;
    white-space: pre-wrap;
    background-color: var(--background-color);
    border: 2px solid var(--primary-color);
    animation: slideUp 0.5s ease-in-out;
}

#copyButton {
    background-color: var(--primary-color);
    color: #FFFFFF;
    width: auto;
    padding: 8px 16px;
    display: inline-block;
    margin-bottom: 10px;
    border: 2px solid var(--primary-color);
    transition: background-color 0.3s ease, transform 0.2s ease;
}

#copyButton:hover {
    background-color: var(--hover-color);
    transform: scale(1.05);
}

.rank-grandmaster { border: 2px solid var(--primary-color); }
.rank-master { border: 2px solid #D32F2F; }
.rank-ace { border: 2px solid #B71C1C; }
.rank-specialist { border: 2px solid #880E4F; }
.rank-cadet { border: 2px solid #AD1457; }
.rank-novice { border: 2px solid #C2185B; }
.rank-rookie { border: 2px solid #D81B60; }
.error {
    color: var(--text-color);
    text-align: center;
}

/* Animation Keyframes */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideDown {
    from { transform: translateY(-20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

@keyframes slideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}